The products $A$ and $B$ formed in the following reaction scheme are respectively:

The most acidic proton and the strongest nucleophilic nitrogen in the following compound are respectively:

Identify the final product $Z$ in the following reaction sequence:

Assertion $(A)$: $-NH_2$ group of aniline is ortho,para directing in electrophilic substitutions.
Reason $(R)$: $-NH_2$ group stabilises the arenium ion formed by the ortho,para attack of the electrophile.
The correct answer is

Nitrobenzene on reduction by zinc and $NH_4Cl$ gives

The amine formed from an amide by means of bromine and alkali has